Dear Wanderer62:
Thank you for sharing your experiences, I was moved by what you wrote and found several similarities in our experiences. I also am 47 and recently (about 7 months ago) was diagnosed with severe PTSD and mild-moderate Autistic Disorder. My Dr. and therapist worked together and explained, I have a delay in cognition and speech. I'm not as high functioning as those with Asperger's. I had previously been misdiagnosed with OCD. At 47 years of age, I have outlived most everyone who ever cared for me or loved me appropriately. I know the hurt and confusion of 'what happens to me now'. I've felt the abandon of family members who found it too difficult to deal with, "the way I am". I don't think I can advise you in a detailed way, but I hope I can relay some message that might be helpful.
I thank God everyday for my mentor, my father who adopted me into his life. My Dad became part of my life 9 years ago and I couldn't be here without him. I chat a few hours daily with him. He lives a few minutes away if I need help. He advises me, keeps me focused, and grounded. I know one day I have to make it alone, completely by myself. I'm preparing for that. I don't want to hold on to material things as much as I want to hold on to peace of mind. I don't have income or work but I go to school. I love it, it's not easy, I cry (a lot at home, only once in a school office), and I feel wonderful when i do complicated assignments correctly. Generally, few people speak to me, but I don't mind that. I like calm and quiet. I keep letting go of the things I was taught were important but really aren't. So far, I've let go of everything but my mind. I hold on to the health of my mind, not the 'things' that will one day be considered useless junk and outlive me. I hold on to college classes and not all the 'what ifs'. I hold on to my adopted Dad (while I still can) and not the abuse and pain I was raised in. Alone in a quiet place is scary at first, but eventually, you find out, it's good and actually helpful. I don't want to rebuild my old life, it didn't work the first time. I work toward building something better. I'm now more informed in who I am, and what works and doesn't work for me. The people I've lost and still think about, they're all looking down and happy I found a way to look at my circumstance and hold on. I hope this also for you. Keep hanging on to all the things that are right and you'll find the way that works for you. Know it, and it'll happen.
Best Wishes